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Diffstat (limited to 'R/ilr.R')
-rw-r--r-- | R/ilr.R | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/R/ilr.R b/R/ilr.R deleted file mode 100644 index 389653e..0000000 --- a/R/ilr.R +++ /dev/null @@ -1,51 +0,0 @@ -# $Id$ - -# Copyright (C) 2012 René Lehmann, Johannes Ranke -# Contact: jranke@uni-bremen.de - -# This file is part of the R package mkin - -# mkin is free software: you can redistribute it and/or modify it under the -# terms of the GNU General Public License as published by the Free Software -# Foundation, either version 3 of the License, or (at your option) any later -# version. - -# This program is distributed in the hope that it will be useful, but WITHOUT -# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS -# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more -# details. - -# You should have received a copy of the GNU General Public License along with -# this program. If not, see <http://www.gnu.org/licenses/> - -ilr <- function(x) { - z <- vector() - for (i in 1:(length(x) - 1)) { - z[i] <- sqrt(i/(i+1)) * log((prod(x[1:i]))^(1/i) / x[i+1]) - } - return(z) -} - -invilr<-function(x) { - D <- length(x) + 1 - z <- c(x, 0) - y <- rep(0, D) - s <- sqrt(1:D*2:(D+1)) - q <- z/s - y[1] <- sum(q[1:D]) - for (i in 2:D) { - y[i] <- sum(q[i:D]) - sqrt((i-1)/i) * z[i-1] - } - z <- vector() - for (i in 1:D) { - z[i] <- exp(y[i])/sum(exp(y)) - } - - # Work around a numerical problem with NaN values returned by the above - # Only works if there is only one NaN value: replace it with 1 - # if the sum of the other components is < 1e-10 - if (sum(is.na(z)) == 1 && sum(z[!is.na(z)]) < 1e-10) - z = ifelse(is.na(z), 1, z) - - return(z) -} |